Benefit Plans (Details) - USD ($) $ in Millions	2 Months Ended	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Components of net periodic benefit cost
Contributions to qualified and non qualified pension plans				$ 22.1	$ 26.0
Benefit Plan, Plan Assets, Reimbursement from CTA				17.0
Pension Plan [Member]
Components of net periodic benefit cost
Benefit Plan, Plan Assets, Reimbursement from CTA	$ 22.8
Domestic Plan [Member] | Pension Plan [Member]
Components of net periodic benefit cost
Service cost		$ 0.0	$ 0.0	0.0	0.0
Interest cost		(4.8)	(4.2)	(9.7)	(8.5)
Expected return on plan assets		(4.5)	(5.8)	(9.0)	(11.6)
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit		0.2	1.5	0.4	3.1
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		0.0	0.0	0.0	0.0
Net periodic pension benefit cost		0.5	(0.1)	1.1	0.0
Domestic Plan [Member] | Other Postretirement Benefits Plan [Member]
Components of net periodic benefit cost
Service cost		0.0	0.0	0.0	0.0
Interest cost		0.0	0.0	(0.1)	(0.1)
Expected return on plan assets		0.0	0.0	0.0	0.0
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit		0.1	0.1	0.2	0.2
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		0.0	0.0	0.0	0.0
Net periodic pension benefit cost		(0.1)	(0.1)	(0.1)	(0.1)
Foreign Plan [Member] | Pension Plan [Member]
Components of net periodic benefit cost
Service cost		1.5	2.3	3.1	4.7
Interest cost		(2.8)	(1.1)	(5.7)	(2.2)
Expected return on plan assets		(3.3)	(3.9)	(6.7)	(7.8)
Defined Benefit Plan, Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit		0.9	0.5	1.8	0.9
Defined Benefit Plan, Amortization of Prior Service Cost (Credit)		(0.2)	(0.1)	(0.4)	(0.2)
Net periodic pension benefit cost		$ (0.1)	$ (1.1)	$ (0.1)	$ (2.0)